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Lipids are a constitutive component of cytolytic granules.
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- Baranov, Vladimir (author)
- Umeå universitet,Klinisk immunologi,Immunologi/immunkemi
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- Nagaeva, Olga (author)
- Umeå universitet,Klinisk immunologi
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- Hammarström, Sten (author)
- Umeå universitet,Immunologi/immunkemi
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- 2000
- 2000
- English.
- In: Histochemistry and Cell Biology. - 0948-6143 .- 1432-119X. ; 114:2, s. 167-71
- Journal article (peer-reviewed)
Abstract
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- Cytolytic granules are specific organelles of activated cytotoxic lymphocytes mediating storage and regulated excretion of lytic molecules for killing of target cells. A variety of the other granule components may also participate in granule-mediated cytotoxicity. In this study, the subcellular localization of lipids in the granules of human decidual CD56+ natural killer-like cells was determined by staining with malachite green aldehyde and imidazole-buffered osmium tetroxide. Lipids were shown, for the first time, to be a constitutive component of cytolytic granules. Lipids formed an additional structural microdomain, located between the granule-limiting membrane and the granule core. Images of the granules on serial sections suggested that intragranular lipids wrap the core. We speculate that granule lipids participate in packing of lytic molecules inside the granules, in autocrine signaling ending granule secretion, and in the killing process.
Subject headings
- NATURVETENSKAP -- Biologi -- Cellbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Cell Biology (hsv//eng)
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- ref (subject category)
- art (subject category)
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